package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.ObjectUtils;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/**
 * @author deng
 * @package com.sky.service.impl
 * @date Created in 2024/7/11 14:35
 */
@Service
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";


    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 用户端登录
     *
     * @param userLoginDTO
     * @return
     */
    @Override
    public UserLoginVO login(UserLoginDTO userLoginDTO) {
        String openId = getOpenId(userLoginDTO);
        if (ObjectUtils.isEmpty(openId)) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User byOpenId = userMapper.getByOpenId(openId);
        if (ObjectUtils.isEmpty(byOpenId)) {
            byOpenId = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(byOpenId);
        }
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID, byOpenId.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims);
        UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(byOpenId.getId())
                .openid(openId)
                .token(token)
                .build();
        return userLoginVO;
    }

    private String getOpenId(UserLoginDTO userLoginDTO) {
        HashMap<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String respose = Optional.ofNullable(HttpClientUtil.doGet(WX_LOGIN_URL, map)).orElseThrow(() ->
                new LoginFailedException(MessageConstant.LOGIN_FAILED));
        JSONObject jsonObject = JSON.parseObject(respose);
        if (jsonObject.getString("errcode") != null && !jsonObject.getString("errcode").equals("0")) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        return jsonObject.getString("openid");
    }
}